Might be interesting for authors to see which books sold over 100,000 copies in 2007. The list is below. Even more interesting, would be some insight into how each of these authors accomplished this. Authors, if you're reading, feel free to comment!
* The 4-Hour Workweek: Escape 9-5, Live Anywhere, and Join the New Rich by Timothy Ferriss. Crown, (332,272 copies sold)
* Where Have All the Leaders Gone? by Lee Iacocca. Scribner (310,000 copies sold)
* Freakonomics [Revised and Expanded]: A Rogue Economist Explores the Hidden Side of Everything by Steven D. Levitt and Stephen J. Dubner. Morrow (275,000 copies sold)
* Now, Discover Your Strengths by Marcus Buckingham and Donald O. Clifton. Free Press (239,966 copies sold)
* The Black Swan: The Impact of the Highly Improbable by Nassim Nicholas Taleb. Random House (199,784 copies sold)
* Made to Stick: Why Some Ideas Survive and Others Die by Chip Heath and Dan Heath, Random House (161,053 copies sold)
* Go Put Your Strengths to Work: 6 Powerful Steps to Achieve Outstanding Performance by Marcus Buckingham. Free Press (140,574 copies sold)
* Basic Black: The Essential Guide for Getting Ahead at Work by Cathie Black. Crown Business (139,806 copies sold)
* What Got You Here Won't Get You There: How Successful People Become Even More Successful by Marshall Goldsmith with Mark Reiter. Hyperion (123,732 copies sold)
* The No Asshole Rule: Building a Civilized Workplace and Surviving One That Isn't by Robert I. Sutton. Business Plus (115,954 copies sold)
* Talent Is Never Enough: Discover the Choices That Will Take You Beyond Your Talent by John C. Maxwell. Thomas Nelson (104,971 copies sold)